基于电磁辐射检测的空间放电源定位误差分析  

Error Analysis for Partial Discharge Source Location in Space Based on Electromagnetic Wave Detection

作　　者：刘卫东[1] 胡小锋[1] 

机构地区：[1]军械工程学院电磁环境效应国家级重点实验室,石家庄050003

出　　处：《微波学报》2015年第4期60-65,共6页Journal of Microwaves

基　　金：国家自然科学基金(61172035)

摘　　要：为评估局部放电源的空间定位误差,建立了4元接收阵列定位模型,分别计算得到了其对方位角、俯仰角以及距离的估计误差,并对比分析了其影响因素,结果表明:降低时延估计误差或增大接收阵列的几何尺寸可以有效降低局部放电源的定位误差。在此基础上,研究了数据采样频率对时延估计误差的影响,并通过Monte-Carlo仿真得到了时延估计误差与数据采样频率之间的关系为στ≈0.29/fs。为了提高定位系统在实际应用中的实时处理能力并降低时延估计误差,研究验证了内插增采样在降低时延估计误差方面的可行性和有效性。To research the location errors for partial discharge source in the space,a positioning model with four receiving antennas was setup,and the estimation errors of azimuth angle,pitch angle and distance were calculated. With comparative analysis of their impact factors,the results showed that,the location errors of partial discharge source can be reduced by decreasing the time delay estimation error or increasing the geometry size of the receiving array. In order to reduce the location error,the relationship between data sampling frequency and delay estimation error was studied,and the expression asστ≈0. 29 /fswas given by ten thousand times Monte-Carlo simulation. According to this relationship,higher data sampling frequency should be selected to improve the location precision. But considering the real-time processing ability of the location system in practical application,an interpolation up- sampling method was studied for reducing time delay estimation error,and its feasibility and validity was verified.

关 键 词：电磁辐射 局部放电 定位误差 时延估计 采样频率 内插增采样 

分 类 号：TM835[电气工程—高电压与绝缘技术]